Dust-collector



(No Model.)

G. WALTER.

I I DUST COLLECTOR. No. 474,490.

Patented May 10, 18:92.

Mew 0'60 wad/fer.

ms nonms PETERS c0" PNQYO-UYNO., Wasymc'rou, u. c.

UNITED STATES PATENT OFFICE.

GEORGE WALTER, OF DULUTH, MINNESOTA.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 474,490, dated May 10,1892.

Application filed August 21, 1891. Serial No. 408,302. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE TALTER, of Duluth, in the county of St. Louisand State of Minnesota, have in vented certain improve ments in DustCollectors, of which the following is a specification.

My invention relates to dust-collectors, and especially to improvementsupon the dustcollector described and claimed in my application forpatent, Serial No. 376,859, allowed May 21,1891; and the object of theinvention is to simplify and cheapen the construction of suchdust-collectors and render the same more efficient and reliable and moreeasily regulated.

My invention consists in a horizontal cylinder having closed ends, incombination with a long narrow inlet-spout extending nearly or quiteacross the full length of. the drum or cylinder, a discharge ordischarges, a longitudinal opening or slot arranged in the cylinder, anda receptacle provided in connection therewith for receiving the dust.

,The invention consists, further, in a particular construction of theoutlet spout or discharges, in a particular arrangement of saidlongitudinal slot and the dust-receptacle, and in a particularconstruction of the dust-dis charge spout in the lower end of thedust-receptacle.

My invention will be more readily understood by reference to theaccompanying drawings, in which- Figure 1 is a transverse sectional viewof a dust-collector embodying my invention. Fig.

2 is a section on the line x a; of Fig. 1. Fig. 3 is an end elevation ofthe dust--collector. Fig. 4 is a sectional detail of the dust-dischargespout.

As shown in the drawings, the main part of the dust-collector is made upof the cylinder or drum having the cylindrical walls 2 and the ends 3and t,provided with central openings adapted to receive the sleeves 5and 6, respectively. The edges of these openings are preferablystrengthened by the wooden blocks or rings 7, secured on the ends orheads of the drum. The axial spouts 5 and (3 are adapted to be pushed inor out through their openings and to carry off the purified airfroni thecenter of the drum.

The idea of the invention is to throw the d ustforcibly against thecylindrical walls of the drum, it being thence discharged into areceptacle, while the air, as it is purified, is continually workedtoward the center or axis of the drum, from thence being dischargedthrough the axial spouts.

It will be seen that when the spouts or sleeves 5 and 6 are pushed intothe drum the space between the ends of .the same will be small, andhence only a limited volume of air may enter the sleeves to flow outthrough the same. On the other hand, when the sleeves are drawn out theymay carry their full capacity of air, the entrance to the mouths of thesleeves being unobstructed.

To further enable the operator to regulate the outflow of air, andthereby the dust deposit, I provide another telescoping sleeve 8 withineach of the sleeves 5 and 6 and adapted to form an extension thereof.The dust-laden air is blown into the drum through the tangential spoutor duct 9. This duct 9 I make narrow and long, as shown, the sameextending clear across the side of the drum and the ends 10 being formedsubstantially by extensions of the ends 3 and at thereof. The top andbottom of the spout are formed by the plates or boards 11 and 12. Theadvantage of this wide spout is that the air is forced into the cylinderand against the wall thereof in a thin wide stream, so that the dust isforced more quickly and readily against the walls 2 by the momentumresulting from the velocity of the air-current. Directly beneath theinletspont and in the lower part of the walls 2 I provide the wideopening or longitudinal slot 13, formed by cutting away the walls andcarrying the part 14 thereof into a vertical plane. The opening thusformed is closed to the direct passage of air by the dust hopper orreceptacle 15, having the funnel shape shown and secured to the woodenframe 16, arranged directly about the edges of the dust-discharge spout.The edge 17 of the wall2 is projected slightly beyond the block 16, sothat the dust after falling into the hopper will not be carried outbyeddy-currents ofair existing within the receptacle. Thus it is seenthat the longitudinal slot is formed in the side of the drum and thedust which collects in or against the inner walls of the drum is drivendown the same and across the bottom of the drum and precipitated overthe edge 17.

The course of the air-currents I have indicated in Fig. 1 with thedotted lines, indicating that the same have a spiral progressivemovement toward the axis of the drum. During the passage of air from thewalls to the center the dust is continually thrown therefrom toward theedge of the walls by centrifugal action. The dust is indicated ingeneral by the small arrows, Fig. 1. A dead-air space practically existsin that part of the drum directly over the dust-receptacle and, as shownby the arrows, the dust loses its velocity at this place, and hence,coming more within the influence of gravity, falls into thedust-receptacle, the force of gravity at this time overcoming, the forceof the air-current tending to carry the dust onward. The dust collectingupon the inside walls of the receptacle 15 slides down into thedischarge-spout 18, which spout is provided with the central core 19 andthe spiral flight 20, arranged about the same and adapted to partiallyclose the direct passage through the spent, so as to prevent the outflowof any considerable volume of air. Such an amount as is required to blowout the dust being alone allowed to discharge, I preferably arrange thespiral and core within the inner sleeve 21, adapted to be pushed intothe outer spout, the same being fitted tightlythereto, so as to be heldfirmly therein without additional fastening or looking, while at thesame time being readily removable in. case the spout becomes choked withdust.

By the arrangemant of the dust-receptacle at the side of the drum 1 gainadditional working space and the advantage of the dead-air spacedirectly above the dust-receptacle. It is obvious, also, that by thisarrangement I relieve the dust-hopper from the air-pressure and causethe dust to leave the machine dry without being intermixed with theoutflowing air. It will be seen, however, that as soon as I push thesleeve into the center of the ends 3 and 4 the air-current throws a partof its pressure into the dust-receptacle. This action would cause theair to flow out freely with the dust. I obviate this objection bypulling the spiral d ust-dischargi ng device into the hopper.

Having thus described my invention, I claim as new and desire to secureby Letters Patent,

1. The combination, with the cylinder or drum, of a tangentialinlet-spout, through which the dust-laden air enters the same, means fordischarging the air, a dust-discharge slot 13, provided in the lowerpart of the cylinder, the vertical portion 14 of the wall, and adust-receptacle arranged beneath the same, substantially as described.

2. The combination,with the funnel-shaped dust-receptacle, of the spout18, the sleeve 21, adapted to be inserted within the same and providedwith the central flight 20, and the core 19, substantially as described,and for the purpose specified.

3. The combination, in a dust-collector, of the cylinder or drum havingthe Walls 2 and ends 3 and 4, with a tangential inlet therefor, thevertical section 14 of the wall 2, the slot 13, the frame 16, theoverlapping edge 17 of the wall 2, and the dust-receptacle dependingfrom said frame, as described.

4. The combination, with a drum having vertical heads arranged at rightangles with its cylindrical walls, of a tangential inlet entering thetop of the drum, an opening arranged in the lower walls of the drum, theinher edge of said opening being arranged to one side of the center ofthe drum, the outer wall 14, vertically arranged, the taperingsettling-chamber 15 for the dust, said tangential inlet-opening beingarranged above the discharge-opening, and air-discharge openingsarranged in the head or heads of the drum, substantially as described.

5. The combination, with the drum having the straight heads 3 and 4,provided with central openings, of adjustable sleeves arranged in saidopenings, the long and narrow tangential inlet-spout 9, arranged on thetop of the drum, said drum provided with the wider dust-dischargeopening 13, and the perpendicular wall 14, whereby a dead-air space iscreated between the projecting edge 17 of the drum and the wall 14,substantially as described.

In testimony whereof I have hereunto set my hand this 13th day ofAugust, 1801.

GEORGE WALTER. In presence of K. E. LITTLE, HOMER B. DIBELL.

ICO

